PTHREAD_RWLOCKATTR_GETPSHARED (3) | C library functions | Unix Manual Pages | :man▋
pthread_rwlockattr_getpshared - get the process shared attribute
.In pthread.h int pthread_rwlockattr_getpshared "const pthread_rwlockattr_t *attr" "int *pshared"
The pthread_rwlockattr_getpshared function is used to get the process shared setting of a read/write lock attribute object. The setting is returned via pshared, and may be one of two values:
| PTHREAD_PROCESS_SHARED || Any thread of any process that has access to the memory where the read/write lock resides can manipulate the lock. |
| PTHREAD_PROCESS_PRIVATE |
| || Only threads created within the same process as the thread that initialized the read/write lock can manipulate the lock. This is the default value. |
If successful, the pthread_rwlockattr_getpshared function will return zero. Otherwise an error number will be returned to indicate the error.
The pthread_rwlockattr_getpshared function may fail if:
| || The value specified by attr is invalid. |
pthread_rwlockattr_init(3), pthread_rwlockattr_setpshared(3), pthread_rwlock_init(3)